I have contacted several manufacturers about the preservation of CD-R, be it Cyanine,Phthalocyanine,Azo compounds, etc. What you will read below is the replies from the manufacturers themselves to these questions: 1. What temperature and humidity are recommended for the preservation of CD-R media archives? 2. How long is the lifespan of your (Cyanine,Phthalocyanine,Azo) formation? 3. Will inert gas storage extend the lifespan?